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1 | /* Copyright (C) 2005 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. | |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
ab84e3ff PE |
15 | License along with the GNU C Library. If not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
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17 | |
18 | #include <atomic.h> | |
19 | #include "pthreadP.h" | |
20 | ||
21 | int | |
22 | pthread_spin_lock (pthread_spinlock_t *lock) | |
23 | { | |
24 | #if 0 | |
25 | volatile unsigned int *addr = __ldcw_align (lock); | |
26 | ||
27 | while (__ldcw (addr) == 0) | |
28 | while (*addr == 0) ; | |
29 | ||
30 | return 0; | |
31 | #endif | |
32 | ||
6dc958e5 | 33 | while (atomic_compare_and_exchange_val_acq(lock, 1, 0) == 1) |
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34 | while (*lock == 1); |
35 | ||
36 | return 0; | |
37 | } |